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Heteropolyacid composite catalyst material H3PW12O40/PAN as well as preparation method and application thereof

A technology of H3PW12O40 and composite catalyst, which is applied in the field of environmental engineering, can solve the problems of low recycling rate and achieve the effects of fast reaction rate, reduced processing energy consumption, and reduced processing cost

Active Publication Date: 2021-09-17
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The active adsorption material has good adsorption effect and low price, but the reuse rate is low, and the material needs to be replaced in time to maintain a stable removal efficiency. In comparison, the use of catalyst degradation treatment is the most ideal method

Method used

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  • Heteropolyacid composite catalyst material H3PW12O40/PAN as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Synthesis of polyaniline: Take aniline solution and add it to 0.1mol / L dilute HCl, the volume ratio of aniline and hydrochloric acid is 1:600, prepare mixed solution 1, dissolve ammonium persulfate in 0.1mol / L dilute HCl , wherein the mass volume ratio of ammonium persulfate and hydrochloric acid is 1:40g / ml, prepare mixed solution 2, refrigerate at 5°C for 20min, slowly add mixed solution 2 to mixed solution 1, and the solution dropping rate is 20ml / h, Magnetic stirring in an ice bath during the dropwise addition, and magnetic stirring at room temperature for 24 hours after the dropwise addition. After the stirring, the polyaniline was washed with water and methanol alternately for 4 times until neutral, then dried in vacuum, and the polyaniline was collected for future use.

[0030] 2) Catalyst synthesis: Mix phosphotungstic acid and polyaniline at a certain mass ratio of 1:0.5, then mix the mixture with methanol at a ratio of 1:15g / ml, heat to reflux under magneti...

Embodiment 2

[0033]1) Synthesis of polyaniline: Take aniline solution and add it to 0.1mol / L dilute HCl, the volume ratio of aniline and hydrochloric acid is 1:400, prepare mixed solution 1, dissolve ammonium persulfate in 0.1mol / L dilute HCl , wherein the mass volume ratio of ammonium persulfate and hydrochloric acid is 1:30, prepare mixed solution 2, refrigerate at 5°C for 25 minutes, slowly add mixed solution 2 to mixed solution 1, the solution dropping rate is 30ml / h, drop Magnetic stirring in an ice bath during the process, and magnetic stirring at room temperature for 24 hours after the dropwise addition. After the stirring was completed, the polyaniline was washed with water and methanol alternately for 6 times until neutral, then dried in vacuum, and the polyaniline was collected for future use.

[0034] 2) Catalyst synthesis: mix phosphotungstic acid and polyaniline in a certain proportion, the mass ratio of phosphotungstic acid and polyaniline is 1:2, then mix the mixture with me...

Embodiment 3

[0037] 1) Synthesis of polyaniline: Take a certain amount of aniline solution and add it to 0.1mol / L dilute HCl, the volume ratio of aniline and hydrochloric acid is 1:800, prepare mixed solution 1, and dissolve ammonium persulfate in 0.1mol / L dilute HCl, wherein the mass volume ratio of ammonium persulfate and hydrochloric acid is 1:50g / ml, prepare mixed solution 2, refrigerate at 5°C for 45min, slowly add mixed solution 2 to mixed solution 1, and the solution dropping rate is 60ml / h, stirring magnetically in an ice bath during the dropwise addition, and magnetically stirring at room temperature for 24h after the dropwise addition. After the stirring was completed, the polyaniline was washed with water and methanol alternately for 3 times until neutral, then dried in vacuum, and the polyaniline was collected for future use.

[0038] 2) Catalyst synthesis: mix phosphotungstic acid and polyaniline in a certain proportion, the mass ratio of phosphotungstic acid to polyaniline i...

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Abstract

The invention discloses a heteropolyacid composite catalyst material H3PW12O40 / PAN as well as a preparation method and application thereof. According to the method, heteropolyacid H3PW12O40 is cured on an organic polymer carrier polyaniline to prepare a supported catalyst H3PW12O40 / PAN, and in a Fenton system, the organic pesticide is degraded by utilizing the acid-base-oxidation reduction catalytic activity of the heteropolyacid. The material has relatively high activity and stability, overcomes the pollution problem in acid catalytic reaction, and can be repeatedly used. In addition, due to rich pore structures and oxidability, the material has double functions of adsorption and catalysis. The reaction rate is high in the normal-temperature reaction process, the problems of acid corrosion and environmental pollution are avoided, and the material can be recycled after being recycled.

Description

technical field [0001] The invention is applied in the field of environmental engineering, and in particular relates to a heteropolyacid composite catalyst material H 3 PW 12 o 40 / PAN and its preparation method and application. Background technique [0002] For a long time, in the late 1930s, organic pesticides replaced inorganic pesticides and were widely used in agricultural production due to their high insecticidal rate. Organic pesticides can be divided into organochlorine pesticides, organophosphorus pesticides, organonitrogen pesticides, and organosulfur pesticides. Even relying on the self-degradation of the environment, organic pesticides cannot be degraded to relevant environmental standards, and the residues of pesticides will cause various environmental pollution problems. Organic pesticides can easily cause biological deformities and gene mutations, and some can cause endocrine disorders. For a long time, it has caused great harm to people's production and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06B01J31/34B01J27/188C02F1/72C02F101/30
CPCB01J27/188B01J31/06B01J31/34C02F1/722C02F1/725C02F2305/026C02F2101/306
Inventor 武海霞刘壁铭
Owner NANJING UNIV OF TECH
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